160 citations · 1.3k across the 49 of their papers we have counts for
Showing 1992Show all
3 papers · 1 filter
gr-qc1992
A Quasilocal Test of the Finiteness of the Universe
Edward Malec, Niall Ó Murchadha
The Cosmological Principle states that the universe is both homogeneous and isotropic. This, alone, is not enough to specify the global geometry of the spacetime. If we were able t…
gr-qc1992★ 14 cited
Trapped surfaces and spherical closed cosmologies
Edward Malec, Niall Ó Murchadha
This article gives necessary and sufficient conditions for the formation of trapped surfaces in spherically symmetric initial data defined on a closed manifold. Such trapped surfac…
gr-qc1992★ 2 cited
There is no vacuum gravitational instanton
Niall Ó Murchadha, Hugh Shanahan
Gravitational instantons, solutions to the euclidean Einstein equations, with topology arise naturally in any discussion of finite temperature quantum gravity. This Lett…